Sentences with phrase «density gradient»

The declining density gradient with height (caused by gravity) permits lighter, warmer air to rise further away from the surface than can colder, heavier air at the same upward pressure gradient force.

At PPPL, a team of researchers including physicists Yang Ren and Walter Guttenfelder has now shown that a steep density gradient can also reduce the strength of the electron turbulence.

Next, primary hepatocytes were isolated from Ndst1fl / fl Alb - Cre + and Ldlr — / — Lrp1fl / fl Alb - Cre + mice by perfusion of the liver with EDTA to dissociate the cells, followed by Percoll density gradient centrifugation as described previously (47).

While the shadowgraph data agreed with previous visualization studies, the PLIF results that provided quantitative measurement of central jet plane density and density gradients offered new and differing results.

They contain plasma density gradients and magnetic fields that often do a good job sparking auroras.

But when scientists create what's known as a «high density gradient,» by making the density of the plasma change rapidly from high at the center to low at the edges, the plasma can get hotter before that heat starts to leak.

We used high - resolution multisensor digital tags attached to foraging blue whales (Balaenoptera musculus) with concurrent acoustic prey measurements to quantify foraging performance across depth and prey density gradients.

It follows that air rising and expanding into a region of lower pressure need do no work on the surrounding molecules because it simply expands into the additional space made available by the reducing density gradient.

Similarly, a parcel falling into a region of higher pressure simply contracts to fit into the reduced space made available by the increasing density gradient.

The rate varies greatly with surface wind velocity, salinity / density gradient stability and CO2 concentration has a small impact on the rate which can be significant on multi-century and millennial scales.

Second is a fiber density gradient with the highest fiber density closer to the body (again mimicking animal fur)- as you sweat moisture droplets are collected in the face of the fabric, the more you sweat the larger the droplets become.

Unlike most oceans, where density gradients are determined by both salinity and temperature, Arctic Ocean waters are heavily stratified primarily because of variations in salinity.

This layering results from a strong density gradient: water layers near the surface are less salty and therefore less dense, while bottom waters are the densest.

Once they drain in summer, the sudden release of fresh - water stratifies the very surface water which then traps more heat at the surface (takes more work by the wind to mix it down against the ocean density gradient) which then leads to fast melting of what's left of the drained pond.

To continue the tea kettle analogy, a steep density gradient can weaken the intensity of the boiling.

Thus they derive the result that am uplift can not have condensation and can not produce rain without a horizontal density gradient.

In particular, the use of bulkier polymer dispersants allowed the effective density of MoS2 to be reduced into the range of the density gradient.

Such a cloud could have a density gradient that dims Boyajian's star over long timescales, as well as small knots of material that could cause the extreme short - term dips.

In addition, a density gradient between surface waters and deep waters is keeping the system stable.

Warming of the oceans will enhance thermal stratification and density gradients, which will reduce vertical mixing.

Bone marrow - derived mesenchymal stem cells (BM - MSCs) are obtained by isolating mononucleated cells from a marrow aspirate by centrifugation on a density gradient, followed by adherent cell expansion in tissue culture.

«Here, we point out that relativistic plasma mirrors can be accelerated drastically and stopped abruptly by impinging intense x-ray pulses on solid plasma targets with a density gradient.»

To analyze how the density gradient affected the strength of the electron turbulence, the team fed information about the plasma's temperature and density into a program run on computers at the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility at Lawrence Berkeley National Laboratory in Berkeley, California.

The data confirmed that the turbulence was low when the density gradient was steep.

Of course a centrifuge spinning a ten foot tube fast enough to make a density gradient in the contained gas would be a potential ballistic launcher in the the «kids, don't try this at home» category.

These changes are everywhere consistent with the local changes in ocean ventilation as identified either by changes in density gradients or by changes in apparent CFC ages.

However, these are localised such that the density gradient between North and South is reduced tending to maintain the THC off state.